This salad is great with lamb, or just on its own. The vinegar cuts through the saltiness of the cheese, and the spinach and pine nuts are just a fantastic flavour combination.
Place the washed spinach with the feta, onion and pine nuts in a bowl.
Sprinkle with sherry vinegar, then drizzle with the oil, which allows the dressing to coat all the ingredients.
Serve alongside grilled lamb, chicken or just with some crusty bread.